%I #5 Mar 31 2012 12:37:23
%S 41,9842,2056392,438083928,93120350760,19798894881900,
%T 4209452449879284,894976200467603100,190281795998287100868,
%U 40456006404952930502220,8601392693737014451368372,1828750854693797651745630540
%N Number of 5Xn 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors
%C Row 5 of A208392
%H R. H. Hardin, <a href="/A208396/b208396.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 171*a(n-1) +8504*a(n-2) +77860*a(n-3) -1000900*a(n-4) -11005932*a(n-5) +78914544*a(n-6) +374284064*a(n-7) -3897108352*a(n-8) +9817487872*a(n-9) -6449426432*a(n-10) -6696632320*a(n-11) +7534936064*a(n-12) +1817837568*a(n-13) -2092433408*a(n-14) -484442112*a(n-15) for n>18
%e Some solutions for n=4
%e ..0..0..0..0....0..0..0..0....0..0..1..1....0..1..0..2....0..1..0..2
%e ..0..1..2..1....1..0..1..0....1..1..2..0....1..1..1..2....1..2..2..1
%e ..0..0..2..0....2..1..0..0....1..2..1..2....1..2..2..1....1..0..1..1
%e ..0..2..1..2....2..0..1..0....0..1..2..1....1..1..0..1....0..0..2..0
%e ..1..1..1..1....2..0..0..1....2..0..0..1....2..2..1..2....0..2..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 25 2012
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